<div class="header">
  <div class="div_t">
    <div class="header_t_l">
      <div id="handerFallback" onclick="history.back()" style="cursor: pointer;">
        <img class="header_img" src="../../../static//images/fallback.png">
        <span style="margin-left: 10px;">返回</span>
      </div>
    </div>
    <div class="header_t_r">
      <div onclick="onMyProject()">
        <img class="header_img" src="../../../static/images/my.png">
        <span style="margin-left: 3px;">我的项目</span>
      </div>
      <div>
        <img class="header_img" src="../../../static/images/avatar.png">
        <span class="username" id="headerUsername"></span>
        <span onclick="onToUser()" style="cursor: pointer;">用户管理</span>
      </div>
      <div onclick="onSignOut()" style="cursor: pointer;">
        <img class="header_img" src="../../../static/images/sign_out.png">
        <span>退出</span>
      </div>
    </div>
  </div>
  <div class="div_b" id="headerDivB"></div>
</div>
